CN107654390B - A kind of pump cavitation-preventive closed-type flow lift performance testing device - Google Patents
A kind of pump cavitation-preventive closed-type flow lift performance testing device Download PDFInfo
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- CN107654390B CN107654390B CN201610598572.3A CN201610598572A CN107654390B CN 107654390 B CN107654390 B CN 107654390B CN 201610598572 A CN201610598572 A CN 201610598572A CN 107654390 B CN107654390 B CN 107654390B
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- Prior art keywords
- pump
- fluid reservoir
- outlet
- measured
- piping
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/83—Testing, e.g. methods, components or tools therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of pump cavitation-preventive closed-type flow lift performance testing devices, belong to pump testing field.Test device of the invention, including inlet pipe, outlet tube road, fluid reservoir, gas exhaust piping, pressure piping and booster pump；The exhaust outlet at fluid reservoir front-end end enclosure center connects gas exhaust piping；The entrance and exit of pump to be measured passes through pipeline respectively and the front-end and back-end sidewall bottom of fluid reservoir connects；The boost port of fluid reservoir rear end top side wall is connected by pressure piping with booster pump；Entrance pressure pipe and outlet pressure pipe are connected separately on the outlet tube road at close pump both ends to be measured and inlet pipe.Test device of the invention avoids cavitation phenomenons, and the inlet and outlet pressure difference of pump is not influenced by being pressurized, and flow lift performance test is accurate.
Description
Technical field
The present invention relates to a kind of pump cavitation-preventive closed-type flow lift performance testing devices, belong to pump testing field.
Background technique
Vane pump need to test the flow lift performance curve under rated speed, use for client and analysis and research provide reliably
Foundation；Traditional test mode is with open type test macro measurement of discharge, lift performance parameter, the export pipeline and inlet tube of pump
Road is all connected with open pond, by the flashboard valve regulating flow in export pipeline, often occurs in big flow significant
Cavitation.Cavitation erosion can be such that lift is remarkably decreased, and the performance parameter of pump significantly deviates normal value, due to what is be precipitated from liquid
A large amount of steam bubbles occupy suction eye runner, and serious cavitation erosion even will appear pump cutout phenomenon, and lift and efficiency are all much
Lower than normal value.
The pump of different specific speed, the form for causing performance to decline by cavitation erosion are different.Low specific speed pump, due to vane channel
It is narrow and long, therefore once cavitate, steam bubble is easy to full of entire runner, thus performance curve in the form of declining suddenly.With
Specific speed increases, the leaf road Long-term change trend short to width, thus steam bubble needs a mistake from occurrence and development to full of entire runner
Transient, the performance curve pumped accordingly are initially slow decline, just show as sharply declining when increasing to a certain flow later.
Axial flow pump blade inner is few, be overlapped between blade it is small, it is total some be in high pressure effect, thus performance curve is in entire scope
Slowly decline.In multistage pump, because cavitation erosion occurs in chopped-off head, so performance curve suppression ratio single-stage pump is small.Axial-flow pump and mixed flow
Before being decreased obviously occurs in lift flow curve, efficiency may have declined pump, so being declined (such as with efficiency sometimes to this pump
1%) critical point cavitated is determined.
Summary of the invention
The purpose of the present invention is influence to measure there are cavitation to solve traditional technology when testing flow lift performance
As a result the problem of, and a kind of pump cavitation-preventive closed-type flow lift performance testing device is provided.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of pump of the invention cavitation-preventive closed-type flow lift performance testing device, including inlet pipe, outlet tube road,
Fluid reservoir, gas exhaust piping, pressure piping and booster pump；
Fluid reservoir is columnar sealing structure, and the front-end end enclosure center of fluid reservoir is provided with exhaust outlet；The front end of fluid reservoir
With rear end sidewall bottom liquid outlet and inlet that be provided with one group of position opposite；The rear end top side wall of fluid reservoir is provided with opening side
To the boost port for being parallel to top of the tank outer circle tangential direction；
The exhaust outlet at fluid reservoir front-end end enclosure center connects gas exhaust piping；The liquid outlet of fluid reservoir front end side wall bottom passes through
Outlet tube road is connected with the entrance of pump to be measured, and the inlet of fluid reservoir rear end sidewall bottom is gone out by inlet pipe and pump to be measured
Mouth is connected；The boost port of fluid reservoir rear end top side wall is connected by pressure piping with booster pump；Close to pump both ends to be measured
Entrance pressure pipe and outlet pressure pipe are connected separately on outlet tube road and inlet pipe；Flow is also equipped in inlet pipe
Meter and flow control valve.
A kind of pump cavitation-preventive closed-type flow lift performance test methods, the specific test method is as follows:
1) the front end side wall bottom and rear end side wall that the entrance and exit of pump to be measured is passed through into pipeline and closed fluid reservoir
Bottom connection makes to form enclosed cavity between the entrance and exit of pump to be measured；
2) pressurized water is injected in fluid reservoir by booster pump, pressurized water is made to fill entire enclosed cavity, until fluid reservoir
The gas exhaust piping of front-end end enclosure center connection has the continual outflow of water；
3) then start pump to be measured, so that the wheel speed of pump to be measured is reached rated speed, and adjust pump discharge end to be measured with
The flow control valve connected on the connected pipeline of fluid reservoir, makes the flow value at pump discharge end to be measured reach the flow rate test of pump to be measured
Value, the gas that pump to be measured generates when opening constantly are discharged from the gas exhaust piping that fluid reservoir front-end end enclosure center connects；
4) when the gas exhaust piping of fluid reservoir front-end end enclosure center connection has the continual outflow of water again, close to be measured
Pump both ends pipeline on respectively by connection entrance pressure pipe and export pressure pipe measure it is to be measured pump both ends pressure value, obtain to
Survey lift performance of the pump under the flow；Then change the flow value at the pump discharge end to be measured, measure the pressure at pump both ends to be measured
Value obtains lift performance curve of the pump to be measured under different flow.
The booster pump is placed in the following water at low temperature of liquid level 0.5m；In pump operation process to be measured, due to impeller, the pump housing
With the rubbing action of water, water temperature can be made to be stepped up, the air being dissolved in water is made to be easier to be precipitated, bubble occurred and gas occurs
Erosion, is distorted test curve.Booster pump water supply uses water at low temperature, while pressurizeing to system, constantly passes through water at low temperature pair
System cooling.
The liquid outlet and inlet opening direction of the front-end and back-end sidewall bottom of the fluid reservoir are parallel to tank base
Outer circle tangential direction.The boost port opening direction of the top side wall of the fluid reservoir is parallel to top of the tank outer circle tangential direction.
It can make to circulate from the liquid for flowing through fluid reservoir along liquid storage top tank structure, gas can be generated since liquid irregularly stirs by reducing
It may.
Beneficial effect
Closed-type test device of the invention is due to being system boost by booster pump, making to test using being enclosed construction
When pump inlet and the absolute pressure of outlet be significantly larger than the vapor pressure of water always, abolished the condition that cavitation erosion occurs, cavitation erosion is existing
As completely disappearing.Because booster pump is inlet ductwork and export pipeline to pump while increasing equal pressure, pump into
Mouth and outlet pressure difference have obtained not by the lift and efficiency for being influenced, being pumped when thus can accurately measure big flow is pressurized
The whole full performance test curve for meeting national testing standard, provides reliably for the exploitation of new pump-type and Hydraulic design
Technological means.
Detailed description of the invention
Fig. 1 is the vertical view connection structure diagram of test device of the present invention；
Fig. 2 is the pipeline connecting figure of fluid reservoir in test device of the present invention；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the flow lift performance test curve that pump is measured in embodiment；
In figure, 1- pump to be measured；2- flowmeter；3- flow control valve 4- fluid reservoir；5- gas exhaust piping；6- pressure piping；7-
Outlet tube road；8- inlet pipe；9- entrance pressure pipe；10- exports pressure pipe；11- booster pump.
Specific embodiment
The contents of the present invention are described further with reference to the accompanying drawings and examples.
Embodiment
For testing the flow lift performance of certain model pump, raised using a kind of pump of the invention with cavitation-preventive closed-type flow
Journey performance testing device, as shown in Figure 1, including inlet pipe 8, outlet tube road 7, fluid reservoir 4, gas exhaust piping 5, pressure piping 6
With booster pump 11；
Fluid reservoir 4 is columnar sealing structure, and the front-end end enclosure center of fluid reservoir 4 is provided with exhaust outlet；Before fluid reservoir 4
It holds and rear end sidewall bottom liquid outlet and inlet that be provided with one group of position opposite；The rear end top side wall of fluid reservoir 4 is provided with out
Mouth is oriented parallel to the boost port of top of the tank outer circle tangential direction；
The exhaust outlet at 4 front-end end enclosure center of fluid reservoir connects gas exhaust piping 5；The liquid outlet of 4 front end side wall bottom of fluid reservoir
Be connected by outlet tube road 7 with the entrance of pump 1 to be measured, the inlet of 4 rear end sidewall bottom of fluid reservoir by inlet pipe 8 and to
The outlet for surveying pump 1 is connected；The boost port of 4 rear end top side wall of fluid reservoir is connected by pressure piping 6 with booster pump 11；Close
Entrance pressure pipe 9 and outlet pressure pipe 10 are connected separately on the outlet tube road 7 at 1 both ends of pump to be measured and inlet pipe 8；In feed liquor
Flowmeter 2 and flow control valve 3 are also equipped on pipeline 8.
A kind of pump cavitation-preventive closed-type flow lift performance test methods, the specific test method is as follows:
1) the front end side wall bottom and rear end side that the entrance and exit of pump 1 to be measured is passed through into pipeline and closed fluid reservoir 4
The connection of wall bottom makes to form enclosed cavity between the entrance and exit of pump 1 to be measured；
2) pressurized water is injected in fluid reservoir 4 by booster pump 11, pressurized water is made to fill entire enclosed cavity, until liquid storage
The gas exhaust piping 5 of 4 front-end end enclosure center of tank connection has the continual outflow of water；
3) then start pump 1 to be measured, so that the wheel speed of pump 1 to be measured is reached rated speed, and adjust 1 outlet end of pump to be measured
Be connected the flow control valve 3 connected on pipeline with fluid reservoir 4, and the flow value of 1 outlet end of pump to be measured is made to reach the flow of pump 1 to be measured
Test value, the gas that pump 1 to be measured generates when opening constantly are discharged from the gas exhaust piping 5 that 4 front-end end enclosure center of fluid reservoir connects；
4) when the gas exhaust piping 5 of 4 front-end end enclosure center of fluid reservoir connection has the continual outflow of water again, close to
It surveys on the pipeline for pumping 1 both ends and the pressure to be measured for pumping 1 both ends is measured with pressure pipe 10 is exported by connection entrance pressure pipe 9 respectively
Value obtains lift performance of the pump to be measured under the flow；Then the flow value for changing 1 outlet end of pump to be measured measures pump 1 to be measured
The pressure value at both ends obtains lift performance curve of the pump to be measured under different flow, as shown in Figure 4.
The booster pump 11 is placed in the following water at low temperature of liquid level 0.5m.
The liquid outlet and inlet opening direction of the front-end and back-end sidewall bottom of the fluid reservoir 4 are parallel to tank base
Outer circle tangential direction.The boost port opening direction of the top side wall of the fluid reservoir 4 is parallel to top of the tank outer circle tangential direction.
Claims (3)
1. it is a kind of pump use cavitation-preventive closed-type flow lift performance testing device, it is characterized in that: include inlet pipe, outlet tube road,
Fluid reservoir, gas exhaust piping, pressure piping and booster pump；
Fluid reservoir is columnar sealing structure, and the front-end end enclosure center of fluid reservoir is provided with exhaust outlet；The front end of fluid reservoir is with after
End sidewall bottom is provided with the opposite liquid outlet and inlet in one group of position；The rear end top side wall of fluid reservoir is provided with boost port；
The exhaust outlet at fluid reservoir front-end end enclosure center connects gas exhaust piping；The liquid outlet of fluid reservoir front end side wall bottom is by going out liquid
Pipeline is connected with the entrance of pump to be measured, and the inlet of fluid reservoir rear end sidewall bottom passes through the outlet phase of inlet pipe and pump to be measured
Even；The boost port of fluid reservoir rear end top side wall is connected by pressure piping with booster pump；Going out liquid close to pump both ends to be measured
Entrance pressure pipe and outlet pressure pipe are connected separately on pipeline and inlet pipe；Be also equipped in inlet pipe flowmeter and
Flow control valve；The booster pump is placed in the following water at low temperature of liquid level 0.5m.
2. test device as described in claim 1, it is characterized in that: the front-end and back-end sidewall bottom of the fluid reservoir goes out liquid
Mouth and inlet opening direction are parallel to tank base outer circle tangential direction.
3. test device as described in claim 1, it is characterized in that: the boost port opening direction of the top side wall of the fluid reservoir
It is parallel to top of the tank outer circle tangential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610598572.3A CN107654390B (en) | 2016-07-26 | 2016-07-26 | A kind of pump cavitation-preventive closed-type flow lift performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610598572.3A CN107654390B (en) | 2016-07-26 | 2016-07-26 | A kind of pump cavitation-preventive closed-type flow lift performance testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107654390A CN107654390A (en) | 2018-02-02 |
| CN107654390B true CN107654390B (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610598572.3A Active CN107654390B (en) | 2016-07-26 | 2016-07-26 | A kind of pump cavitation-preventive closed-type flow lift performance testing device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202338477U (en) * | 2011-12-09 | 2012-07-18 | 山东省农业机械科学研究所 | Water pump test bench capable of automatically returning water |
| CN103114984A (en) * | 2011-11-16 | 2013-05-22 | 北京航天动力研究所 | Control system and control method for opening and closing type pump test |
| CN103758743A (en) * | 2014-01-20 | 2014-04-30 | 兰州理工大学 | Solid-liquid self-mixed multifunctional pump closing-type experimental device |
-
2016
- 2016-07-26 CN CN201610598572.3A patent/CN107654390B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114984A (en) * | 2011-11-16 | 2013-05-22 | 北京航天动力研究所 | Control system and control method for opening and closing type pump test |
| CN202338477U (en) * | 2011-12-09 | 2012-07-18 | 山东省农业机械科学研究所 | Water pump test bench capable of automatically returning water |
| CN103758743A (en) * | 2014-01-20 | 2014-04-30 | 兰州理工大学 | Solid-liquid self-mixed multifunctional pump closing-type experimental device |
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| Publication number | Publication date |
|---|---|
| CN107654390A (en) | 2018-02-02 |
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